Turbo-generator.



NO 894,305. PATENTED JULY 2a, 1908.

A. H. WOUTBRS.

TURBO GENERATOR.

APPLICATION FILED NOV. 3, 1906.

UNITED STATES PATEET OFFICE.

ALFRED II. WOUTERS, OF NORWOOD, OHIO, ASSIGNOR 'IO ALLIS-OHALMERSCOMPANY, A CORPORATION OF NEW JERSEY, AND THE BULLOCK ELECTRICMANUFACTURING COMPANY, A CORPORATION OF OHIO.

TURBO-GENERATOR.

To all whom it may concern:

Be it known that I, ALFRED H. WoUTERs, belonging to the Kingdom of theNether-- lands, residing at Norwood, in the county of Hamilton and Stateof Ohio, have invented certain new and useful Improvements inTurbo-Generators, of which the following is a full, clear, and exactspecification.

My invention relates to dynamo-electric machines and particularly tohigh speed machines of the direct current type, such as direct currentturbo-generators.

In high speed. machines it is necessary to provide means for holding inposition the portions of the coils which project beyond the ends of coreso that the coils can not be displaced by centrifugal action. It hasbeen proposed to surround the projecting portions of the coils by heavyrings or hands. WVhen rings are employed for this purpose, it is necessary to provide some means for supporting and centering the rings andfor preventing movement thereof axially of the machine.

In direct current machines, considerable di'l'liculty has beenexperienced in providing adequate supporting and protecting means forthe coils at the commutator end of the armature, for the reason that thecommuta tor necks or leads connecting the coils to the commutator bars,render diflicult proper supporting of coil retaining rings. Accordinglyband wires have usually been relied upon for retaining the projectingportions of the coils in position. This latter expedient is notsatisfactory for all types of machines, particu larly for high speedmachines of large kilowatt capacity, for the reason that at highperipheral speeds the band wires are in great danger of breaking orbecoming loose and wrecking the machine.

The object of my invention is to provide suitable and reliable means forfastening in.

- position the portions of the coils which pro- Specification of LettersPatent.

Application filed November 3, 1906.

Patented July 28, 1908. Serial No. 341,815. I

then by a heavy rigid ring, the band-wire forming a good bearing surfacefor the ring.

More specifically considered, my invention consists in an armature of adynamo-electric machine having a core and coils which pro ject beyondthe ends thereof, the projecting portions of the coils being tightlywrapped with band wire and inclosed within a heavy rigid ring, whichfits tightly over the band wire, the ring being centered and held inposition by the band wire and also by screws or bolts which preferablypass between the commutator necks into a bracket or shoulder upon whichthe coils rest.

My invention still further consists in certain novel details ofconstruction and combinations and arrangements of parts described in thespecification and set forth in the appended claims.

For a better understanding of my invention, reference is had to theaccompanying drawings forming a part of this application in which Figure1 is a partial sectional elevation of a high speed armature equippedwith my invention; Fig. 2 is a partial end elevation, and a partialsectional elevation on the line 2 2 of Fig. 1; Fig. 3 is a sectionalelevation of a portion of the machine showing a slightly modifiedarrangement of the ring retaining and supporting screws or boltsrelative to the commutator leads; and Fig. 4 is a partial View of theend of the armature, a portion of the coil retaining ring being brokenaway, showing the location of the band wire.

Referring now to the figures of the drawing, 10 represents a shaft onwhich a core 11 and commutator 12 are mounted. The core consists oflaminae held between end members, one of which is shown at 13. Thearmature is provided with a winding having portions 14 which projectbeyond the core and rest upon a shoulder or bracket 15 extendingoutwardly from the end member 18. The end member 13 is also providedwith a slotted flange 16 through which the coils of the winding pass andwith an inwardly extending flange 17 in the outer end of the bracket 15.The shaft 13 in this case is pro vided with slots or flutes 18 whichcommunicate with the air ducts 19 of the core.

The bars 20 of the commutator 12 are held in position on the shaft by aplurality of shrink-rings "21, two of which are shown. The commutatorbars are connected to the ends 14 of the coils which project a shortdistance beyond the flange 17, by radial commutator leads or necks 22extending along I the outer surface of the flange 17 a short distancetherefrom. These leads or necks are preferably riveted to the bars andsoldered to the ends of the coils.

The projecting portions 14 of the coils are bound to the bracket 15 bytightly wound band-wire 24, the strands being arranged closely togetherin a continuous layer covering the entire projecting portions of thecoils except the outer ends and the portions adj acent the flange 16.After the band-wire is wound over the coils, the armature is preferablyplaced in a lathe and the band-wire is turned down forming a truecylindrical outer surface. The projecting portions or ends l t of thecoils are separated from the bracket 15 by insulation 25 and from theband-wire 24 by insulation 26.

Inclosing the coils and the band-wire and fitting tightly over thelatter is a protecting end-ring 27 consisting of a cylindrical portion28 having a flange 29 at right angles to the cylindrical portion andextending inward over the commutator leads. The ring 27 rests not onlyon the band-wire but also on the slotted flange 16 of the end-member. Itis seen that the band-wire forms a good solid bearing surface for thering, thus assisting in centering and supporting the latter, in additionto assisting in resisting the stresses due to centrifugal action In somecases the end-ring may be supported by this means alone. I have alsoshown additional means for supporting and retaining the ring in positionconsisting of axial bolts or screws 30 passing through the inwardlyextending flange 29 of the end-ring 27 into the flange 17 of thebracket15, the flange 29 of the endring being recessed to receive theends of the screws or bolt-s 30. I11 Fig. 2 these bolts are shown aspassing between pairs of adjacent leads, being separated therefrom bycoverings of insulation In case the commutator necks are arranged veryclosely together it may be necessary to spread apart the adjacent necksor leads between which the bolts pass. The comn'iutator leads or necksin. this case are separated from the.

flange 17 of the bracket by insulation 31., and from the inwardlyextending flange 29 of the end-ring by insulation 3;. When the screws orbolts are tightened, the projecting portions 14 of the coils and. thecommutator necks are held firmly in position and can not possibly bemoved or disturbed at high speeds.

In Fig. 3 I have shown a slight modification of the arrangement of thebolts 30 and of the commutator leads. In this case each bolt passesbetween the two straps or con ductors or 33 composing a commutator lead22, special leads being provided so that they may be spread apart toreceive the bolts. As here shown the straps or conductors through whichthe bolts pass are riveted together above and below each bolt. The leadsor necks through which the bolts pass are shown as spaced. fronrtheadjacent necks by insulating spacing members 3%.

It is apparent that I have a very rigid and compact structure, and onethat consists of few parts, which are easily constructed and assembled.It is also apparent that the coils tion that there -an be no movcn'rentthereof nor can they be injured. in any manner.

It is evident that my invention is susceptible of changes ormodifications without departing from its spirit and scope, and I aim inmy claims to cover all such changes and mod ifi cations.

'hat I claim as new and desire to secure by Letters Patent is 1. In anarmature of a dynamo electric machine, a core and end member, coils carried by said core, portions of said coils projecting beyond the core andresting on the end member, a comnnita-tor, commutator leads or necksconnecting the coils and bars of the commutator, said commutator leadsor necks extending inward. over the end of said end-member, a ringsurrounding the proj ecting portions of the coils, and means comprisingbolts or screws for fastening the ring to said endmember.

2. In an armature of a dynamo electric machine, a core and end-member orbracket, coils carried by said core, portions of said coils projectingbeyond the core and resting on said end-member or bracket, a commutator,con'nnutator leads secured to said. coils and commutator, an end-ringsurrounding the projecting portions of the coils, and bolts or screwspassing between the commutator leads and insulated therefrom forfastening the end-ring to the end-member or bracket.

3. In an armature of a dynamo electric machine, a core, coils carried.thereby, a bracket for supporting portions of the coils projectingbeyond the core, said bracket having an inwardly extending flange at itsouter end, an end-ring surrounding the coils and having an integralflange extending imvardly spaced therefrom, a commutator, commutatornecks or leads extending inwardly between said flanges and connectingthe coils and commutator, and means for securing the end-ring inposition against axial movement.

1. In an armature of a dynamo electric machine, a core, coils carriedthereby, a 1 bracket for supporting portions of the coils j projectingbeyond the core, said bracket hav ing an inwardly extending flange atits outer and commutator necks are so held in posi- 3 parallel to theflange on the bracket but end, an end-ring surrounding the coils andhaving a flange extending inwardly parallel to the flange on the bracketbut spaced therefrom, commutator necks or leads extending inwardlybetween said flanges and insulated therefrom, and means for securingsaid ring against axial movement comprising axial bolts or screwspassing through the flange of the ring between the commutator necks orleads and into the bracket.

5. In an armature of a dynamo electric machine, a core, coils carriedthereby, an end member or bracket supporting the ends of the coils,means for retaining the ends of the coils in position comprising awrapping or covering of band-wire presenting a smooth cylindricalexterior surface, a rigid ring sur rounding said band-wire in engagementtherewith and centered thereby, and means for seaxial movement of saidring.

6. In an armature of a dynamo electr1c curing the ring to the end memberto prevent machine, a core, coils carried thereby, a bracket supportingthe ends of the coils, a commutator, radial commutator necks or leadsextending inwardly from said coils to the commutator, means for holdingthe ends of the coils on said bracket, comprising a covering of tightlywrapped band-wire, and a ring surrounding said band-wire in engagementtherewith and centered thereby, said ring being provided with anintegral annular flange extending inwardly toward the commutator overand protecting the commutator leads, and means for retaining said ringin position comprising bolts passing through said flange between saidcommutator necks and into said bracket.

In testimony whereof I aiflx my signature, in the presence of twowitnesses.

- ALFRED II. VVOUTER-S.

Witnesses:

ARTHUR F. Kwrs, GEO. B. SoHLEY.

